i agree, you did it! but do so in spurts. your ride sounds like my husbands ride: 6.5 miles with about 200 ft elevation gain.

i would plan on committing to 2 days a week, then 3 days a week for maybe a month. then move to 4 days a week for a couple weeks then 5 days a week when you're ready. the 2-4 days a week will help your body get used to it. definitely stretch after riding. i know you just want to plop down somewhere.

riding 5x a week takes a toll on your body too. and no shame in going at an easy pace, it's more relaxing and will let you endure for the ride. it sounds like you will eventually cover 60 miles a week. good luck getting there!